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table of contents

exceptions and message boxes
8 / Get the message?

Sometimes things just go wrong. You just need to handle it.
There will always be things beyond your control. Networks will fail. Files will
disappear. Smart coders learn how to deal with those kinds of errors and make
their programs recover gracefully. The best software keeps the user informed
about the bad things that happen and what should be done to recover. By learning
how to use exceptions and message boxes, you can take your software to the
next level of reliability and quality.

What’s that smell? 294
Someone changed the file permissions 295
When it couldn’t write to the file, the program threw an exception 296
Catch the exception 297
Watch for exceptions with try/except 298
There’s an issue with the exception handler 302
A message box demands attention 303
Creating message boxes in Python 304
Your Programming Toolbox 311

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